Lost Crown — What To Do When a Crown Comes Off
A crown that has come off can be unnerving, but it is usually not a medical emergency. In many cases the same crown can be cleaned and re-cemented, especially if you bring it with you and have it seen quickly. Our team at Sandgate Family Dental can help you settle the tooth, assess the crown, and replace it where needed.
If your crown has just come off, follow the steps further down this page and book an appointment online. We see patients from across the northern Brisbane area.
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What patients usually notice
The moment a crown debonds can be subtle or dramatic. Common signs include:
If the underlying tooth is decayed or fractured, you may also see a dark patch, feel a sharp edge, or notice some bleeding from the gum around the area.
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Why crowns come off
Crowns rely on a healthy underlying tooth and a strong cement bond. The most common reasons a crown comes off include:
Decay underneath
New decay can develop along the edge of the crown, gradually undermining the cement seal. This is one of the most common causes we see.
Cement breakdown over time
Cement bonds soften with age and exposure to the oral environment. Older crowns are more likely to debond, even when the underlying tooth still looks healthy.
Sticky foods
Toffees, caramels, chewing gum, and dried fruits can grip onto a crown and pull it free, particularly if the cement seal is already weakening.
Grinding and clenching
Constant pressure on a crown can stress the cement bond over months and years. A custom nightguard can help protect crowns in these situations.
A cracked underlying tooth
A fracture in the tooth beneath the crown can change how forces are transmitted and contribute to debonding. See our page on cracked teeth for more.
Trauma
A knock to the face during sport or a fall can dislodge a crown. Our information on sports dental injury outlines what to do at the side of the field.
Appointment
What to do before your appointment
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Can the same crown be put back on?
Sometimes, yes. Whether a crown can be re-cemented depends on three things: the condition of the crown, the condition of the underlying tooth, and what caused it to come off in the first place.
Re-cementing the same crown may be possible when:
A new crown is usually recommended when:
Your dentist will check both the crown and the tooth at your visit before deciding which option is appropriate. More background on materials and longevity is available on our dental crowns and crown materials pages.
Appointment
What happens at your appointment
1. A gentle history
We will ask when the crown came off, what you were doing at the time, and how the tooth has felt since.
2. Examining tooth and crown
Your dentist will check the underlying tooth for decay or fracture and inspect the crown for cracks or wear.
3. X-rays where appropriate
A small digital X-ray helps us see what is happening below the gum line and around the root.
4. Re-cementing or planning a new crown
Where the situation allows, we will clean and re-cement the existing crown. If a new crown is needed, we will explain the steps and fees clearly before going ahead.
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Who this page is for
If a tooth has broken away with the crown, our page on a broken tooth outlines the next steps.
Payment
Health funds and payment
We are a HICAPS provider, so where you have eligible dental cover we can process your health fund claim at the practice and you only need to pay any gap. Re-cementing a crown is usually a simple visit; a brand new crown is a more involved item and rebates vary considerably between policies.
The exact rebate depends on your individual policy, your level of cover, and your annual limits — your fund can confirm what is covered before treatment. We can provide an itemised plan with item numbers so you can check entitlements in advance, and discuss payment plan options for a new crown.
FAQs
Lost crown FAQs
Is a lost crown a dental emergency?
Usually not, but it is worth being seen within a few days. The underlying tooth is more vulnerable without its protective cap, and the longer the area is left, the more likely a simple re-cement turns into a larger restoration.
Can I glue my crown back on at home?
No. Household glues are not safe in the mouth and can damage both the crown and the underlying tooth. Pharmacy temporary dental cement can offer a few days of cover until you are seen.
Will I always need a new crown?
Not necessarily. Many crowns can be re-cemented if the crown and the underlying tooth are still in good condition.
Why does my tooth hurt without the crown on?
The underlying tooth was prepared for the crown, so dentine sits closer to the surface. This often makes the area sensitive to air, temperature, and sweet foods until the crown is replaced.
What if my crown breaks while it is off?
Bring the pieces with you. Sometimes a broken crown can still be assessed for clues about why it failed, even if a new one is needed.
Can a crown come off because of grinding?
Yes. Heavy grinding or clenching is a common factor in repeated crown loss. We may suggest a nightguard alongside any new crown.
How soon should I be seen?
Within a few days is ideal — sooner if the tooth is painful or you have a sharp edge that is bothering your tongue. Book online and we will fit you in promptly.
On this page
Speak to our team
If a crown has come off, please put it somewhere safe and let us know. Most situations can be settled with a single visit and a short follow-up if needed. Book online or phone the practice during opening hours.
Related pages
Related pages
Need to be seen?
Tell our team what’s going on and we’ll find a time.
Or phone Sandgate Family Dental on (07) 3269 6252.